Utility officials say a Nebraska nuclear plant is operating at full power again after a brief outage last month.

The Omaha Public Power District said Wednesday that Fort Calhoun resumed generating electricity on March 19 - two days after a problem on the non-nuclear side of the plant during maintenance triggered the shutdown.

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It reached full power on March 21.

This is the second time Fort Calhoun went offline briefly since it restarted in December after a prolonged outage.

Fort Calhoun, which sits about 20 miles north of Omaha, had been off line from April 2011 until December. It initially shut down for routine maintenance, but significant flooding in 2011, a small fire and a series of safety violations forced it to remain closed for more than two years.